Machine for making optical prisms



Feb. 16 1926. 1,573,609

c. F. JENKINS MACHINE FORMAKING OPTICAL PRISMS Filed Nov. 4, 1922 'rSheets- Sheet 1 Jaw? Fat. 16 192s. 1,573,609

c. F. JENKINS MACHINE FOR MAKING OPTICAL PRISMS Filed Now 4, 1922 7ShGets-Sheet 2 Feb. 16 1926.

1,573,609 0. F. JENKINS I MACHINE FOR MAKING OPTICAL PRISIIS Filed Nov.4, 1922 v Sheets-Sheet '5 gnucnfoz 1,573,609 C. F. JENKINS MACHINE FORMAKING QP'ITICAL PRISMS Filed Nov. 4, 1922 7 Sheets -Shet 4 -Feb. '16192s.

(3. F. JENKINS MACHINE FORMAKING OPTICAL PRISMS Fb. f6

' Filed Nov. 4, 1922 7 sheetssheet 5 Feb. 16,1926. 1,573,609 C. F.JENKINS MACHINE FOR MAKING OPTICAL PRISMS Filed Nov. 4, 1922 'rSheets-Sheet s C. F. JENKINS MACHINE FOR MAKING OPTICAL PRISHS Filed Nov4, 1 3 7 Sheets-Shoot 7 Federated Feb. 16, 12$i 1 nurse sures PATENTomens snmz'ors JENKINS, o1? wssmueroii; ers'rmocar concerns, seem-nor.so more me rrmss oonronsrzon, OF ursssriNeTom-ms'rmor cs" oososmm, .eoossonsrxom;

meorrmssos Msxius oze'rrosli Pmsi/is.

v Application flied fflovem'oer d, 1922. Serial Ho. 599,171,

'2' 0 all whom ii may co'n'cer'iu i the line l0 of Figure 9 looking inthe Be it known that I, CnniuissFuAscrs direction of hhe arrows;dimmers, a citizen of the United States, re- Figure 11 is a pian'view ofthe pa rs shown; siding vat -Washington, in the District of in Figure1;' 4 1 5 Columbia, hive invented eermin'new and Figure 1 2 is asectional VIQWGOHVJQZIQ l ne useful Improvements in Machines, "6! Malii2--12 of l igure 15,1coking in the eh'reetion ing Optical Prisms; and Ido hereby decia ic of the arrows; H the following to he s ffuii, clear,and exact Figure 13 is msectionsi View on ihe Tens description of theinvention, such as will en- 1313 of Figure 3, looking in the(illffiiliflfl ahie others skilled in the art which it ap- 'of thearrows; v

perieins ts -rnake and use the o Figure M: is a section isizei'ijon theline This im euigion relates to n machine for l4'1 of Figure 8,1oohingiii the dire-2 wishing ress or ienses suitable for transiion of thearrows, with certain per-is 6 mit'ting pictures by wireless w'aies, andfor ,oin ii ed; 1- .15 other purpesss,'and has for iis object to proIiigure 15 iis e perspcotive iew of a on;- vide mechanism ofthistfiherecter which euhi double prism mode by this machine; will besimple in. construction, certain in 0 'Fig 13116 deizaii perspectiveViEW of oration end-more eiiicient in use than "11056 one of fihepoiis'hing neansor sticks employed 7 heretofore proposals x by 1113machine; and c With these rind other objects in View the Figure 17 is atop plan view of the abrede inveiiticn consist in/ the novel details 01"ingnfiool odrive meehanismas'soeiahed thereconstruction and combinationsof parts'more Wis v I v H fully hereinafter disclosed and particularly joieaizes en suitable ,fremewori; on pointed out in 'che claims. which ismounts the pivot 2 carrying the 25 Referring to/the accompanyingdrswingsyswifiging arm 3 provided with the motor v 'forming a, psrticfthis specification, in which support ix'to which is ettsched themotorlike numerals designate like-parts in all the 5 carrying a, pulley6 ,er 0und one side views: 17 I which passes the helix 7, n-hiehdrivesthe 5?? Figure 1 is :1 side eievatione View of a larger puiiey 8xnountedon the shaft 9, oer 4 machine made in accordance with this inrying the pulley 10 around Whichp'esses the vention; belt 11 driving thepulley limounted on Figure Q is a irontelevational View of the the shaftlii'end preierahiy provided with parts shown in Figure l; the handoperating means 14. Asbest' shown Figure 3 is a side eievational view insecin Figures 1, 2 and 3,'the shaft 13 is pro 35 tion ofthe machineshown in Figure l; videdywithihe Worm 15 meshing with ih e Figure 4 is?sectional detail View of a Worm gear 16 rigid ivith the irerticsiiydisportion of the parts shown in Figure 3; posed rotating shaft 17 whichis 'so iported Figure 5 is a sectional View of a portion by the tubularmembers 18 mini 111, mounted of the parts shown in Figure 4; on brackets11.0 rigid with. the firsme of the Q Figure is a section taken on th eiine meehine. One of'these brackets is shown in 6-6 ofl igure 4, showingthe parts in one Figure 2. On top of the sleeve 18 rests the position;sleeve 19 rigid with/the table 20 end the F gure 7 is aruiew similar toFigure 6, shaft 17, and on the table 20 rests the rism showing the parts111 anotherposition; support/21 adapted'to receive the dis; like 45Figure'S is an enlarged detail side eievnprism "22 being manufactured.The said tionelyiew partly broken away of a portion shaft 17 is providedwith the colier 23 and of the reversing mechanism shown in: Figwith thepinion 24 meshing; with one of e ure 1; v j pliiraiity of racks 25mounted on a slide 1% Figure 9 is a detail elevationei vivcwparmemhei'26 and held in the slideweys 2;? as 1W $11111 broken array of a portionof the 10- best shown in Figures'2, 3 send 1%. Rioiid versing mechanismshown in, Figure 2; with the sliding member 26 is the rack men. Figure10 is n sectional view token on her 28 having the vertically disposedteeth.

29 with which mesh the teeth of the curved rack 30 rigid with thebracket or frame 31 provided with a pair of supporting arms 32 and 33pivoted respectively at 34 and 35 to the'upper portions 36 of themachine, as best shown in Figures 1, 2, 3 and 11. Mounted in the frame31 is the screw member 37 provided with the pinion 38 with which meshesthe pinion 39 adapted to be operated by the hand wheel 40, as Will beclear from Figure 3. Operated by the screw member 37 is the verticallyreciprocating member 41 having the right angular extension 42 as bestshown in Figure 4. Mounted in said member 42 is the screw member 43adapted to be operated by the hand wheel members 3 and 4:

44 and connected with said screw member 43 is the slide member 45 towhich is rigidly attached. the member 46 carrying the hinged pivot 47,on which swings the supporting member 48, supporting the member 4-9, seeFigures 1 and 3, on which slides the polishing arm 50.

Adjustably ecured to said polishing arm 50, as by the means 51 is theoperating member 52 secured. to the cam 53 as by the means 54: Said cam53 is mollhtotl on the short shaft 55 eccentrically mounted in the shortcylindrical member 56 rotating with the sleeve 5'7 carrying the wormwheel 58 en-.

gaging the worm 59 rigid with the shaft 60 of the motor 61.

Referring more particularly to Figures 2 aud'8, it will be observed thatthe rim of the pulley 8 in addition to accommodating the belt 7 haspassed around the same an additional belt .lt will further be observedthat above the pulley 6 carried by the motor shaft 63 there is an idlerpulley 6 1i. over which said belt 62 passes, that said belt 62 passesaround a side of said pulley 6 opposite to that occupied by the saidbelt 7, and that below said pulley 6 there is an additional idler pulley65'around which said belt 62 passes. It will further be observed thatthe motor 5 swings on its supporting around the pivot 2 asa center bymeans, presently to be disclosed, its shaft moves from the full lineposition shown in Figure 8 to its dotted. line position shown in said.figure, and that in so moving it carries the pulley 6 with it.

The effect of thus moving from the full line position to the dotted lineposition shown in Figure 8 is to tighten the belt 7 and to cause thepulley 8 and the belt 11 to turn in a given direction, depending uponthe direct-ion in which. the motor shaft 63 is driven. Further, saidmovement from said full line position to said dotted line posiion shownin Figure 8 has the ellect ofloosening the belt (32and thus to ceasedrivlng said pulley 8 and. belt 11 from said belt 62. On the other hand,when the motor shaft and driving pulley 6 is in its full line--follows:ltigid with the slide new aces position shown in Figure 8, thebelt 62 is tightened while the belt 7 is loosened, and the pulley 3 andbelt 11 turned in an opposite direction, or is reversed. In other words,the motion of the belt 11 will be reversed each time the motor shaft 63shifts from its full line to its dotted line position shown in" Figure8/ The reversal of the motion of the belt 11, of course, reverses the toand fro and the toe 68 of the curved rack 30 is raised and lowered andthus swings the frame 31 and arms 32 and 33 on their pivots 34 and 35respectively. The oscillation of the said motor 5 and motor shaft 63around the pivot 2 as a center is accomplished as member 26, see Figures2, 3, 9 and 10, is the Vertically depending arm 115 to which is pivotedas at 116 the adjustable rod 117.

To said rod 117 is pivotally secured as at 118 the crank arm 119 rigidwith the shaft 120, the lefthand end of which, as seen in Figure 2,passes through the frame of the machine and has attached thereto as at121 a weighted arm 122 provided with. the swinging weight 123 controlledby the spring 124-, The other, or right hand end of the shaft 120, asseen in Figure 2, is provided with. the clutch member 125 which coactswith the corresponding clutch memher 126, asbest shown in Figures 2 and9., Between the clutch members 125 and 126 is provided a conside'rableamount of lost motion as evidenced by the open spaces 127,, The saidclutch member 126 is rigid with the short shaft 130 whichgis acontinuation of the shaft 120 and which extends through the right handside of the frame as seen in Figure 2, and has rigidly attached theretothe crank arm 131 best shown in Figures 1 and 8.

Adjustably secured to one end of the said crank 131, as at 132 is theadjustable rod 133 whose other end 134; is pivotally secured to themotor support at as best illustrated in Figures 1 and 2. Also ri id withthe clutch member 126 is swinging arm 135 extending up inside the framework as illustrated in Figures 2 and 8. To this said arm 135 isadjustably securedjas at 136, the swinging member 137 controlled by thespring 138 as shown. It thus results that as the motor 5 reciprocates,the rack 25 and 28, in the manner above disclosed, likewise lUU ' l'vbeyond its vertical position whereupon herv 125, in a clockwise the arm122 and weight 123 will suddenly fall toward the right as mm Figure 3,and thus will suddenlyturn the clutch mem- Fi are 3, Giving to the lostmotion affordj suddenly the crank ed ythe spaces 127, said clutch member125 will rather violently strike the clutch memher 126 and thus willforce suddenly the arm 135 from the full line position in Figure 8 overto its dotted line position shown in said figure, and will likewiseforce lill toward the left as seen in Figure 8. The sudden movement ofthe crank 131 in the direction just mentioned will pull the adjustablerod 133'as ,well as the. motor support 4 suddenly to' ,Wfii'd the leftas seen in Figure 8.-

The

movement of the motor suPl 4 toward course,

shaft 63 together with the pulley 6 suddenly the left in the mannerdisclosed will o'f carry the inotor .5 and its operating from-the fullline position shown in Figure 8 to the dotted line position shown insaid,

. figure, with the resultthat the belt 7 tightens and the belt 62loosens, which has the edcct of reversing the pulley 8 and belt ll'inthe manner above disclosed. Of course, the reverse]. of the motion ofthe revolving belt 11 will move the racks 25 and 28 in a reversedirection or toward the right ,as secnin Figure 3, and thisreciprociition of the said racks will .contin'ue indefinitely as long asthe motor 5 is operated. The raising, however, ofthe toe (58 and frame31 in the manner above disclosed, only slightly raises the extreme lefthand end of the slidalole polishing arm 50, and its associated polishmgparts, due to the fact that said end and polishing parts are quite nearthe line join- I too ing said pivots 34 and 35. In the-same way,

the falling of said end 70 and its associated polishing parts islikewise slight when the 68 of the curved rack-30 falls, I t"isdirection as seen in ily taken off and attached to the reciprocattheupper-end of the shaft 17 "which passesthrongh the central orifice 78 ofthe disk as will be clear from Figures l and 15. disk 22 being thusfirmly clan'lped in place an abrading of said disk 22 as best shown inFigure 17. Said wheel is conveniently supported item the bracket 78 andis rotated by the shaft 79 havingthe universal joints 80 and which shattis turned by the motor supported on the member 82 pivoted as at Sfil tothe frame member 84 of the machine, llhe abrading disk 75 being thusrapidly rotated by the motor 81, the glass disk then rotated on itscenter by the means above dirclosed, whereupon the ci'icuniicrcntialgroove indicated at 85 in Eigure 11 is cut entirely around the S'QhlCllSlI QQ. But, as said wheel 75 is slightlyiaised and loweredperiodicallyduring the rotation of the disk 22 by means of the arm whichis attached to the polishing arm 50 see Figure 17, the groove 85 is docor at its end 86 than at its end 87, all as will/he clear t'rom Figures11 and 15. That isto say, the innercdgc of the groove Basin be deeper atthe point 86 than itwill at the point 87, while the outer" edge of saidgroove 85 or 01": the disk itself will he thicker at the point 86 thanat the point- 87 due to the slight up and down movement of the polishingarm 50, above described.

a The disk being thus provided roughly wlth the circumferential groovefo, and

The polishing or finishing of the prisms bounded on one side by thegroove 85 and on the other side by the surfaceof the dish 22, isaccomplished by a plurality of polishmg tools'employinh; difierentpolishing-me diums in the manner well known. That is to say, thesevarious polishingtools are reading polishing arm 50 as will be clearfrom Figures 3, l and 16.

In Figure 4, for example, the screws 14:0

enable one to readily attach and detach'the n5 polishing mechanism 141which is provided w th the pulley 142 around which pass'esthe drivingbelt 143 which is driven from the wheel 75 is radially disposed 70 anddown periodically around the pivots necessary, however, that the extremeend of I I motor 81 in Figure 11, it being understood the .-pol1sl' ngpartshav-ma slight motion up that said motor maybe the same as that--34c and 35 as a center, in order to properly shape the circular prismsthat are menu- "d actured by this machine, all 'aswillappear more fullyhereinafter.

Said prisms are preferably made from disks of glass 22 and circulargrooves 76 are preferably cut into their faces as best illus trated inFigure 15. After said groove 76 'lS cntin a disk QQ/the latter is'firmly secured V to the table 21 by the screw member 77, and

llfl turned through an angle of 90 and v with the driving pulley 145attached thereto. or it may be an entirely'difi'erent motorac cording tothe desires of the operator.

75, has finished its operation, the-arm 78' ing mechanism 141 isattached to the reciplOCtllilIl; polishing arm 50, as will be clear 65fnom t e drawings' shown in Figure 17 with the vdriving; shaft Ofcourse, as soon as the abrading whe'el and the shaft 79 are removed andthe. polishthe other, it may I clear from the foregoing held by themeans 118 is shown as attached to the polishing arm 50. In substitutingthese various polishing devices the one for be desirable that the strokeof the arm 50 be changed and such change may be desired at other times.Accordingly; the adjustable means 51 attaches the reciprocating arm 52to said polishing arm and in addition to this, the eccentrically mountedshaft 55 has attached thereto the crank arm 150, see Figures 4, 5, and7, which is provided with the knob 151 and the pin 152 adapted to berotated around the. short cylindrical shaft 56 and to be secured in anyone of the holes 153. I arm 150 in the manner just disdttis'd moves theshaft 55 around the 'centeruoi the sleeve 57 and thus bodily moves inlalengthwise di'-' rection the operating member 52 and polish ing member50, all as will be readily understood from the drawings. In other.words, the effective stroke of the said arm 50 may be thus readilyadjusted by turning. the knob 151 and securing the pin 152 into itsproper hole 153. v

The operation df'this machine will be but maybe briefly summarized asfollowsz- A transparent disk 22 provided with the groove 76 is clampedto the table 21, and the motor 5 is started. Said motor through theshaft 63 and belt 62 will revolve the pulley 8 and through the belt 11will revolve the pulley l2 and shaft 13, thus moving through the pinion24. the racks 25, 28 and 30, until said racks complete their stroke) inone direction. hen the rack 25 and slide 26 thus reach the end of theirstroke, the reversing shaft 120 by means of the connections 115,117 andllil turns the arm 122 and weight 123 beyond their dead center, thuspermitting them to fall and to cause the clutch member 125 to strike theclutch member 126 a blow.

The sudden striking of the clutch member 126 in the manner disclosedsuddenly turns the short shaft 120 and cranks 131 and 135 in a clockwisedirection as seen in Figure 8, and thus through the connection 133suddenly pulls the motor support 4 and motor shaft 63 from their fullline positions, shown in Figure 8 to their dotted line positions shownin said figure, with the result that the belt 62 is loosened, the belt 7is tightened, and the pulleys 8 and 12 together with the shafts 13 and17 reversed in their motions. The reversal of the motion of the shatt"-17 and pinion 241 reverses the motion or" the racks 25, 28 and 30,and this 1 versed motion continues until the weight 12 again passes itsdead center while moving in the The turning otthecranlo new direttion,and the clutch member 125 strikes the clutch member .126 a new blow inthe new direction of rotation, when the motor support 4 and motorshatt63 willbe again moved to their full line position shown in Figure 8.When this occurs the belt 7 will he suddenly loosened-and the belt 62suddenly tightened thus again reversing the movement of the racks backto the former or original direction.

It will thus be of the rack 28 is automatic and will continue as long asthe motor 5 is operated. It will also beclear that as the toe 68 of rack30 lifts it raises the frame 81 and the end portion/ of thereciprocating around the common axis of and 35 as a center, for thereason that the curve of said rack 30 is struck from said axis as acenter. Of course, as the toe 68 falls, saidportion 70 reverses itsmotion around said axis. when finishing a. plate having only tworeversed prisms like that shown in Figure 15 that a complete revolutionof the plate corresponds to a complete oscillation of the rack 28, andof the said portion 70 around said axis. It thus results that in cuttingthe rough groove 85 with the abrading Wheel 75, see Figure 17, the saidwheel will be in its highest position when working at the portion 85 andwill be gradually lowered until the portion 160 is reached, which is 180from said portion 86 and said wheel will then begin to rise and willcontinue to rise until the portion 87 is reached which substantiallycoincides circumferentially with the portion 86. These up and downmotions of the abrading and other tools controlled-by the arm 50 produceannular shaped prisms around the circumference of the disk 22 which arereversed in their optical actions, which are tapered in thicknessbetween the points 86 and 160, and 87 and 160, and whose-thickened ends86 and 87 are joined to each other as shown.

It will be clear that the extreme edge 165 of the polishing device shownin Figure 1 like all the others used in this machine, reciprocatesradially of the plate 22 to and from the central axis 17, as said platerotates or oscillates, and that as the groove 76 extends below the inneredge 166 of the annular prism said edge 165 has ample opportunity towork over the face of the prism and to pass beyond said inner prism edge166 and thus polish to the fullest egrtent the entire prism surface.

The polishing material'passes on into the groove 76 of the plate andalso into the receptacle 167 with which the machine is provided.

It is preferred to so adjust the hand wheel 40 and screw 37, as well asthe screw 180 on the shaft 17, as will cause the polish seen that thereciprocation The parts are so timed 80 polishing arm I the pivots 34.-

' ing from the spirit reciprocating a to said support; a

instance race of the prism and the working faces of the polishing toolsto occupy positions very slightly above the axis of the pivots 34: and35 when the thicker ends 86 and 87 of the prisms are being worked on,andto cocupy positions slightly below said axis when the thinner ends 160of said prisms are being worked on. That is, said working faces will.operate in the plane of said axis when half way between the thick andthin ends of the prisms. In Figures 3 and 14: a pluralityof racks 181and 182 are illustrated as disposed diiierent distances from the centralaxis 17. Theze racks are adapted to coa'ct withlpinions similar to 24but o.f a larger diameter and which for said pinion 24 may cause themovements of the working tools around the. axis of said pivots 34 and 35to be accelerated. This acceleration in turn will shorten the angularlength of the prisms, and increase the num-. her that can be formedaround a single disk.

The pivoted lever 183 enables the operator to swing the working toolsand their associated parts on the hinge 4:7,as best shown in Figure 1,and in their elevated position, thus facilitating the cleaning andremoval of the disks 29..

t is obvious that those skilled in the art may vary the details ofconstruction as well as the arrangement of of the invention andtherefore I do not wish to be limited to the above disclosure except as,may be-required by the claims.

What is claimed is; I

1. In a. machine of the character described, the combination of asupport; means for moving said support around a center; means forsecuring a circulartrans parent member to said support; means forfinishing member radially of said circular member; and means to moresaid last named means around a second iixed center while saidtransparent member is being moved around said first named center.

2. In a machine of the character described the combination of a support;means to escillate said support; a second means for se curing atransparent member tosai d sup port; a third reciprocating means for acting on a circular portion of said transparent member while the latter isoscillating; means for pivoting said last named means on an axis; andmeans for moving said third means around said axis'as a center to shiftthe same into and. out of operative engagement with said transparentmember.

In a machine of the character described, the combination of a 'sup ort;means to oscillate said support; a second means for securing atransparent member third means comprising a reciprocating member foracting on a 011'- when substituted to hold said parts partswithoutdepartmoving around cular portion of said transparent member while thelatter is oscillating; means for pivoting said last named means on anaxis; and means for moving said third means around said axis as acenter.

a. In a machine of the class described the combination of means foroscillatingatransparent member around an. axis; a reoipro-. eating meansadapted to act on said member in a plane inclined to said axis; andmeans for changing the inclination of said plane while said transparentmember is oscillating around said axis.

5. In a machine of the classdescribed the combination of means formoving a transparent-member around an axis; a reciproeating meansadapted to act on -said member moving a transparent member aronn axis;arec1procat1ng means adapted to act on said member in a direction radialto said;

axis and in a plane inclined to said axis; and means comprising anroosting member for increasing and decreas ing the inclination of saidplane'while-said transparent member is moving around said. axis. r 7. Ina machine of the class described the combination of means for moving atransparent member around an axis; a reciprol eating means adapted toact on said member I in a direction inclined to said axis; and asGlirliztllll'lg means for automatically slowly automatic recip" andconstantly-changing the inclination of said direction throughoutsuccessive rec1p rocations while said transparent member is said axis.,8. In a machine at the class described transparent-member around anaxis" arciproc'ating means adaptedto act on said her in a directioninclined to said axis; and

means for automatically slowly and con-' stantly changing theinclination of said direction between and, hrou'ghouasuccessivereciprocations a pivoting and supporting,

the combination of means for moving-a while said transparent mom her ismoving around said axis. 1 I" I 9. Ina machine for inaking'cpticalprisms" ,1

i for oscillating a a the c.

upon the rim portion of said disl': during he OSCllilfliZlOIl thereof; apivoting and supporting means for causing said reciprocating means toact upon said disk in a plane in clined to said axis; and automaticmeans for periodically changing the inclination of said plane,

11. In a machine for making roptical risms the combination of means foroscilating a transparent disk around a fixed axis; a reciprocating meansadapted to act upon the rim portion of said disk in a radial directionduring the oscillation thereof; a pivoting and supporting means forcausing said reciprocating means to act upon said disk in a planeinclined to said axis; and means for adjusting the stroke of saidreciprocating means.

12. In a machine for making optical risms the combination of means foroscilating a transparent disk around a fixed axis; a reciprocating meansfor acting upon the rim portion of said disk during its oscillation;pivoting and supporting means for causin said reciprocating means tomove in a p aneinclined to said axis; and means for manually moving saidreciprocating means in a directionlongitudinal of said axis,

13. In a machine of the character described, the combination of asupport; means for moving said support around a center; automatic meanscomprising a reciprocating rack for reversing the direction of motion ofsaid support; means for securing a cir cular transparent member to saidsupport; means for reciprocating a finishing member radially of saidcircular member; and means to move said last named means around a secondfixed center While said transparent member is being moved around saidfirst named center.

14; In a machine of the character described, the combination ot asupport; means comprising a reciprocating rack and connections tooscillate said support; a second means for securing a transparent memberto said support; a third means for acting on a circular portion of saidtransparent member while the latter is oscillating; means for pivotingsaid last named means. on an axis; and means for moving said third meansaround said axis as a center.

' 15. In a machine of the class described, the combination of means,comprising an oscillating pinion and a reciprocating rack for moving atransparent member around an axis; a reciprocating means adapted to acton said member in a plane inclined to said axis; and means for changingthe inclinzition of said plane While said transparent member is movingaround said axis.

16. In a machine oi. the class described the combination of meanscomprising an oscillating pinion and a reciprocating rack withwhich saidpinion meshes for moving a transparent plate around a fixed'axis; meansadapted to act on and to reciprocate in contact with said plate towardand away from said axis during the movement of said plate; pivotingmeans forsaid second named means; and means to move said second namedmeans around said pivoting means While said plate is moving.

17. In a machine for making optical prisms the combination of meanscomprising a reciprocating rack and an oscillating pinion foroscillating a transparent disk around a fixed axis; a reciprocatingmeans adapted to act upon the rim portion of said disk during theoscillation thereof; and a pivoting and supporting means for causingsaid reciprocating means to act upon said disk in a plane inclined tosaid axis.

18. In a machine for making optical prisms the combination of meanscomprising a rack and pinion-for oscillating a trans parent disk arounda fixed axis; a reciprocating means for acting upon the rim portion ofsaid disk during its oscillation; pivoting and supporting means forcausing said reciprocating means to move in a plane inclined to saidaxis; and means for manually moving said reciprocating means in adirec-' tion longitudinal of saidaxis.

19. In a -m achine of the character de scribed, the combination of asupport; means for moving said support around a center: means forsecuring a circular transparent member to said support; a finishingmember. means comprising a cam for reciprocating said finishing memberradially of said circular member; and means comprising a curved rack anda straight rack with which said curved rack engages to move said lastnamed means around a. second fixed center while said' transparent memberis being moved around said first namedcenter.

20. In a machine 01" the character described the combination ot asupport; means to oscillate said support a second means for securing atransparent member to said support; a third means ior'acting on.acircular portion of said transparent member While the latter isoscillating; means for pivoting said last named means on an axis; andmeans comprising curved and straight racks for moving said third meansaround said axis as a center.

' 21. In. a machine otthe class described the combination or" means formoving a transparent member around an axis; a reciprocating meansadapted to act on said member in a plane inclined to said axis; and

means comprising a curved rack and a straight rack meshing therewith forchangdid ing the inclination of said plane while said transparent memberis moving around said axis.

22. In a machine of the class described, the combination of means formoving a transparent plate around a fixed axis; means adapted to act onand'reciproc'ate in contact with said plate toward and away from saidaxis during the movement of said plate;

pivoting means for said second named means; and means comprisingcurvedand straight racks to' move said second named means around said pivotingmeans While said plate is moving.

' 23. In a machine for making optical prisms the combination of meansfor oscillating a xtransparent .disk around a fixed misfit-reciprocatingmeans adapted to act uponthe-rimportionofsaid disk during theoscillation thereof; and a pivoting and j supporting means comprising acurved rack for-causing said reciprocating means to act upon'saidndiskiinja planeinclined to said axis. V In a machine for, makingoptical prisms the combination of means for oscillating a. transparentdisk around a fixed axis; a reciprocating means for. acting upon the rimportion of said disk during its oscillation; pivoting and supportingmeans comprising .intermcsh ng curved and straight racks for causmg saidreciprocating means to move in a plane inclined to said axis; and

[means for manually moving said reciproprising eating means in a saidaxis.

direction longitudinal of 25. In a ,machineof the class described thecomblnation of means for moving a trans arcnt member around an axis areci rocating meansadapted to act on said mom-- axis; and ineanslf forautomatically lo'wly and constantly changing the inclination of saiddirectioirthroughout successive reciprocations hile-said transparentmember is moving arcundsaid axis.

26; In a machine of the transparent member around an axis; areciproosting means adapted to act on said memher in a radial directioninclined to said axis; andmeans for automatically slowly and constantlychanging and tion of said direction throughout successive reciprocationswhile said transparent member ismoving around. said axis.

27. In a machine for. making optical prisms, the combination of a shaft;means for securing a prism to said shaft; a second shaft gcarediosaidfirst named shaft; 21 motor- -"driving connections between saidmotor'alhnd said second shaft; means coma pivoted wveight for suddenlychanging said driving connections to cause said shafts to oscillate saidprism; and

dially of said prisms revers ng the inclinathe oscillation thereof Ipassing through the centerof the said mm m means-"moving radially ofsaid prism to work upon its surface.

' 28. In a machine for making optical prisms, the combination of ashaft;qmeans for securing a prism to said shaft; second shaft geared tosaid first named shaft; a motor; driving connections between said motorand said second shaft; means comprising' a pivoted Weight for suddenlychangingsaid driving connections to cause said shafts to oscillate saidprism; means moving rato work; upon their surfaces; and means forswinging said radially moving means around an axis while operating uponsaid surfaces.

29. In a machine for making optical prisms, the combination of a shaft;means i for securing a prismto said shaft; a second shaft geared to said4 motor; driving connections between. said mo-' tor and said secondshaft; means comprising "a" pivoted weight, for suddenly changing thecombination of means for moving a transparent member around an axis; areciprocating means adapted to act' on said member in a directioninclined to said'axis; and oscillating means for automatically slonilyand constantly changing and reve'rs' ing the inclination of saiddirection] throughout successive reciprocations while said transparentmember is moving around said axis. 3 v

31}. In a machine of the class described the combination of means formoving a transparent member around an'axis'; a re ciprocatingmeansadapted to act on sai member in adiretion inclined to said axis;and means for automatically slowly and constantly changing theinclination of said direction throughout successive recipriocaticnsabout an axis intersecting the middle point While said of the range ofreciprocation, transparent member is moving first mentioned axis:

32. In a machine for mailing optical lenses, the combination of meansfor oscillating a transparent member around a fixed around said upon therim portion of said member during and a second axis portion of themember for pivotally supporting said reciprocating means.

33. In a machine for making optical lenses, the combination of means foroscillating a transparent member around a fixed axis; adjustablereciprocat ng means adaptfirst named 5 shaft; a y

12o] axis; reciprocating means adapted to act ed to act upon therimportion of said member in a. radial direction during the oscilla-'tionthereof; and a second axis passing through the center of the saidrim portion of the member for pivotally supporting said reciprocatingmeans.

34. In a machine for maxing optical lenses, the combination of means foroscillating a transparent member around a fixed axis; reciprocatingmeans adapted to act upon the rim portion of said member during theoscillation thereof; and a "second axis passing through the center ofthe said rim portion of the member tangentially of the finished surfacethereof, for pivotally supporting said reciprocating means.

ing the oscillation thereof; a second fixed axis passing through thecenter of the said rim portion of the member for pivotallysu'pporting'said reciprocating means; and means to move saidreciprocating mean: about said second axis.

36. In a machine for making optical lenses, the combination of means foroscillating a transparent member around a fixed axis; reciprocatingmeans adapted to act upon the rim portion of said member during theoscillation thereof; a second fixed axis passing through the center ofthe said rim portion of the member for pivotallysupporting saidreciprocatingmeans; and oscillating means to move said reciprocatingmeans about said second axls during the oscillation of said member.

In testimony whereof I affix my signature.

CHARLES FRANCIS JENKINS.

